3-Formylmethyl-cephalosporins
3-Heterocyclic substituted cephem compounds
3-Heterocyclicthio-7-.alpha.-carboxy 2-aryl acetamido cephalospo
3-Heterothio substituted 7-(ureido-heteroacetyl) cephalosporins
3-Heterothio-7-ureido cephalosporins
3-HETEROTHIOMETHYL UREIDO CEPHALOSPORINS
3-Indolyl-3-bis-amino-phenyl-phthalide compounds
3-Oxopyridazinylthiomethyl derivatives of ureidocephalosporins
3-Phosphonium and 3-phosphoranylidenecephems
3-Substituted-7-methoxy-7-amino-3-cephem-4-carboxylic acids
3-Substituted-7-substituted alkanamido-3-cephem-4-carboxylic aci
3-Vinylcephalosporin derivatives